implement basic features

config/packages/asset_mapper.yaml

@@ -1,5 +0,0 @@
-framework:
-    asset_mapper:
-        # The paths to make available to the asset mapper.
-        paths:
-            - assets/

config/packages/twig.yaml

@@ -1,6 +1,10 @@
 twig:
     default_path: '%kernel.project_dir%/templates'
-
+    globals:
+        app:
+            version: '%app.version%'
+            name: '%app.name%'
+            theme: '%app.theme%'
 when@test:
     twig:
         strict_variables: true